.computer {
  width: 400px;
  margin: 0 auto; }
  .computer .show {
    height: 120px;
    background: #000;
    color: #fff;
    font-size: 30px; }
    .computer .show > div {
      padding: 10px 20px 0; }
  .computer ul li {
    float: left;
    width: 100px;
    height: 100px;
    line-height: 100px;
    text-align: center;
    border: 1px solid;
    box-sizing: border-box; }
    .computer ul li.act {
      background: #e1e1e1; }

.box {
  width: 400px;
  height: 160px;
  margin: 0 auto;
  border: 1px solid #ddd;
  border-radius: 3px; }
  .box .head {
    border-bottom: 1px solid #dee2e6;
    padding: 16px; }
  .box .body {
    border-bottom: 1px solid #dee2e6;
    padding: 16px; }
  .box .foot {
    text-align: right;
    line-height: 40px; }
    .box .foot button {
      padding: 3px 6px;
      margin-right: 15px;
      outline: none; }

* {
  margin: 0;
  padding: 0; }

li {
  list-style: none; }

a {
  text-decoration: none; }
